A new proposal for laparoscopic left colectomy in a rat model.

Area of Science:

• Surgical Innovation
• Animal Models in Research
• Gastrointestinal Surgery

Background:

• Laparoscopic surgery offers potential benefits over open procedures.
• Establishing reliable animal models is crucial for surgical technique development.
• Left colon resections require precise anastomotic techniques.

Purpose of the Study:

• To assess the feasibility and safety of a novel laparoscopic segmental colectomy technique.
• To evaluate primary anastomosis in the rat left colon using laparoscopy.
• To compare low-pressure versus standard-pressure pneumoperitoneum in laparoscopic colectomy.

Main Methods:

• Thirty rats underwent left colon segmental resection and end-to-end anastomosis.
• Three groups were formed: laparoscopic surgery with 5 mmHg CO2 pneumoperitoneum (Group I), 12 mmHg CO2 pneumoperitoneum (Group II), and open surgery (Group III).
• Postoperative evaluation included assessment for complications and measurement of anastomosis bursting pressure on day 7.

Main Results:

• No significant differences in anastomosis bursting pressure were observed among the groups (p = 0.503).
• The average anastomosis bursting pressure was 187.02 ± 68.35 mmHg.
• No obstructions, peritonitis, or abscesses were detected; one case of anastomosis leakage occurred in the low-pressure group.

Conclusions:

• Laparoscopic segmental colectomy with primary anastomosis in the rat left colon is a feasible and safe experimental model.
• Low-pressure carbon dioxide pneumoperitoneum (5 mmHg) is a safe option for this laparoscopic procedure.
• This model provides a reliable platform for further research into laparoscopic colorectal surgery.